Robin Good: The Open Font Library is an online resource which hosts, organizes and offers quality professional typographic fonts for download and use.
All of the fonts that are part of the OFL are free to use, share and remix.
You can browser the full fonts catalogue here:
To find out more about Open Fonts see: http://openfontlibrary.org/en/guidebook
Presently the Open Font Library hosts 126 font families.
Find out more: http://openfontlibrary.org/